The concept of a "dog barking alarm" can be replaced by a variety of synonyms that convey a similar message. One option is "canine intrusion detection system," which can be used to describe any type of security device that uses the sound of a barking dog to deter intruders. Another synonym is "bark deterrent," which refers to any product or technology that aims to stop dogs from barking excessively. Additionally, "dog bark sensor" is a more technical term that is often used in the context of home automation and smart security systems. Ultimately, the synonym that one chooses will depend on the specific context and purpose for which the term is being used.